Splyce won’t because they won, Tox won’t because they can still be the best again and the updated settings will probably play in their favour.

NV can take games off Splyce consistently and almost knocked out Tox to get to Grand Finals so they are close to top 2. Reciprocity might be changing, but they know that they can play better and are able to beat Tox which is their main goal.

I think the big problem with the lack of any new maps being added is that the Post launch maps failed for one reason.

Sight lines across the map.

Symmetry is a big part of a good map, but if you can see and shoot cross map from a lot of places, it makes it great competitively. Truth and Coliseum work. Rig and Plaza work although they are asymmetrical. Empire, Regret, and Fathom have symmetry but not a lot of sightlines that’s why they are only used for one game type each.

Of the post launch maps, Overgrowth, Riptide, Tyrant, and Molten have almost no cross map sight lines.
Torque, Stasis and Mercy have a few, but if you aren’t up high then you are shit out of luck.